ECN Forum Forums Code Related Discussion NEC & other Code issues Conduit fill Calculations

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#219842 12/08/18 08:37 PM

Joined: Jan 2004

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1-1/4 in EMT #1 THHN Table C4 allows 4 conductors. This exceeds the 40% fill limit per Table 1 Why is this allowed?

George Little

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George Little #219843 12/08/18 09:39 PM

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Dunno, when I run it I get 1.59 sq in and a 1.25 EMT is 1.50
Didn't someone just tell me NFPA was infallible

Greg Fretwell

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